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A Coding Theorem for f-Separable Distortion Measures [PDF]

open access: yesEntropy, 2018
In this work we relax the usual separability assumption made in rate-distortion literature and propose f -separable distortion measures, which are well suited to model non-linear penalties.
Yanina Shkel, Sergio Verdú
doaj   +8 more sources

The Distortion Theorem for quasiconformal mappings, Schottky’s Theorem and holomorphic motions [PDF]

open access: yesProceedings of the American Mathematical Society, 1997
We prove the equivalence of Schottky’s theorem and the distortion theorem for planar quasiconformal mappings via the theory of holomorphic motions. The ideas lead to new methods in the study of distortion theorems for quasiconformal mappings and a new proof of Teichmüller’s distortion theorem.
G. Martin
semanticscholar   +3 more sources

A sharp form of the Ahlfors’ distortion theorem, with applications [PDF]

open access: yesTransactions of the American Mathematical Society, 1984
The constant appearing in the asymptotic version of the Ahlfors’ distortion theorem is 1 1 . Also it is shown that for mean
D. H. Hamilton
semanticscholar   +3 more sources

A distortion theorem for quasiconformal mappings [PDF]

open access: yesBulletin de la Société mathématique de France, 1986
There exists a constant \(C=C(K,n)\) such that for any K-quasiconformal mapping \(f: B^ n\to {\mathbb{R}}^ n\) and for any \(z\in B\) there exists \(x\in \partial B^ n\) with \(| z-x| 1) \] where \(f^*\) is the nontangential maximal function.
M. Zinsmeister
semanticscholar   +2 more sources

A distortion theorem for analytic functions [PDF]

open access: yesProceedings of the American Mathematical Society, 1971
Let f ( z ) f(z) be a function analytic in the disk E { z : | z | > 1 } E\{ z:|z| > 1\} and for some real number n > 0 n > 0 let
M. M. Robertson
semanticscholar   +3 more sources

A rate-distortion theorem for arbitrary discrete sources [PDF]

open access: yesIEEE Transactions on Information Theory, 1998
Summary: A rate-distortion theorem for arbitrary (not necessarily stationary or ergodic) discrete-time finite-alphabet sources is given. This result, which provides the expression of the minimum \(\varepsilon\)-achievable fixed-length coding rate subject to a fidelity criterion, extends a recent data compression theorem by [\textit{Y.
Po-Ning Chen
exaly   +3 more sources

A Koebe distortion theorem for quasiconformal mappings in the Heisenberg group [PDF]

open access: yesAnnali di Matematica Pura ed Applicata, 2019
We prove a Koebe distortion theorem for the average derivative of a quasiconformal mapping between domains in the sub-Riemannian Heisenberg group H1\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage ...
Tomasz Adamowicz   +2 more
semanticscholar   +2 more sources

ON MULTIVALENT HARMONIC MEROMORPHIC FUNCTIONS INVOLVING HYPERGEOMETRIC FUNCTIONS [PDF]

open access: yesالمجلة العراقية للعلوم الاحصائية, 2011
In this paper we introduce a subclass of multivalent harmonic meromorphic functions defined in the exterior of the unit disk by using generalize hypergeometric functions.
ABDULRAHMAN SALMAN JUMA
doaj   +1 more source

Distortion theorems for Bloch functions [PDF]

open access: yesTransactions of the American Mathematical Society, 1992
We establish various distortion theorems for both normalized locally schlicht Bloch functions and normalized Bloch function with branch points. These distortion theorems give lower bounds on either
Liu, Xiangyang, Minda, David
openaire   +1 more source

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